Cingular and Alltel involve in aggressive and expensive advertising for cell-phones. A reason for this advertising may be: (1) attempts to increase market share. (2) predatorily drive other firms by the market. (3) to increase the use of cell phones. (4) to deter entry by potential new competitors. (5) All of the above are possibilities.
Please choose the right answer from above...I want your suggestion for the same.